Overclocking my AMD Athlon 64 3500+ venice

Hi, i overclocked my CPU up too 2.7 GHz, it crashed with a blue screen so i changed it too 2.5 Ghz,
Anyway... when upping the MHz my MEM and HT changes aswell.
Is there a way too prevent this from happening?

not with that CPU, you need a CPU with an unlocked multiplier (an example is the Core 2 Duo Extreme), if your CPU has an unlocked multiplier you will see an option to change the multiplier, increasing it will increase the CPU clock without changing the FSB